Hughes is 2-1 with a 2.70 earned run average in 47 relief appearances for the Pirates this season. The right-hander was sent to the minors this past weekend when Juan Cruz was activated off the disabled list.

Navarro is hitting .178 with one homer and four RBI in 25 contests for Pittsburgh this year.

Qualls, who needs some time off due to an illness in his family, has played for the Yankees, Phillies and Pirates this season.